Abstract:
A composite hybrid cord comprising a core comprising of a first bundle of synthetic filaments having a filament tenacity of from 10 to 40 grams per decitex and a plurality of cabled strands helically wound around the core, each cabled strand comprising of a plurality of metal strands helically wound around a center second bundle of synthetic filaments that have a filament tenacity of from 10 to 40 grams per decitex. The ratio of the largest cross sectional dimension of the first bundle of synthetic filaments to the largest cross sectional dimension of the second bundle of synthetic filaments is from 1.5:1 to 20:1. The metallic filaments of the cabled strands have an elongation at break that is no more than 24 percent different from the elongation at break of the synthetic filaments of the first and second bundles.
Abstract:
A pneumatic radial tire having a tire component consisting of a steel cord, wherein the steel cord has (a) a 1+N structure in which N pieces of sheath filaments are twisted around a core filament permanently formed into a spiral shape in a cord longitudinal direction, (b) a flat cross-sectional shape, (c) an open structure where the sheath filaments have clearances between adjoining filaments at the cord cross section, (d) the core filament cut into clearances between the filaments, and (e) the spiral direction of the core filament aligned with the twisting direction of the sheath filaments.
Abstract:
A process for producing a steel cord for pneumatic tyres with a bunch of wires, the core of which consists of wire filaments (10) arranged in a bunch parallel and adjacent to one another. There are advantageously at least three wire filaments (10, 20), where at least two wire filaments (10) are spirally wound as filaments (10) forming a core (60) and run parallel and beside each other and at least one wire filament is spirally wound around the two core filaments (10) as the wrapping wire (20). According to the invention, the spiral deformation of the wire filaments (10) is obtained by false twisters (40). This spiral deformation of the wire filaments (10) especially prevents migration of the filaments from the cord composite. It is an advantage if residual torsional stresses between the core filaments and in connection with the restoring forces of the wrapping wire are relieved. The steel cord also advantageously has a flattened, especially oval, shape.
Abstract:
A steel structure adapted for the reinforcement of elastomers, said steel reinforcement comprising one or more steel filaments (10). At least one of said steel filaments (10) is provided with a first crimp and a second crimp. The first crimp lies in a plane that is substantially different from the plane of the second crimp. Applying both crimps can be done in an efficient way by means of two pairs (12, 14) of toothed wheels which are not externally driven. By means of these crimps it is possible to obtain steel structures with an increased penetration of rubber or with an increased elongation at break.
Abstract:
Ein Seil umfasst Kohlenstoff enthaltende Filamente, welche jeweils von einer Schlichte ummantelt sind, wobei die von der Schlichte ummantelten Filamente von einer Matrix umgeben sind, wobei die Matrix aus einem wenigstens ein Elastomer und/oder wenigstens ein thermoplastisches Elastomer enthaltendem Material zusammengesetzt ist. Dieses Seil kann insbesondere zum Ziehen einer Last, beispielsweise in einem Lastaufzug, verwendet werden.
Abstract:
A steel cord used for reinforcing rubber product with an oval cross-section has a structure of m+n, while m is the number of core wires (26) and n is the number of the outer layer wires (22). The core wire (26) is untwisted while m is 1 or the core wires (26) are untwisted and aligned in parallel while m is between 2 and 4, and the outer layer wires (22) are twisted around said core wires (26). The core wires (26) are oval wires and the outer layer wires (22) are round wires. The wires (22, 26) in the steel cord have a carbon content not less than 0.60%.